Restructuring (Tables)

6 Months Ended

Jun. 30, 2013

Schedule of changes in company's liabilities for its restructuring plans

As of June 30, 2013, the Company’s liabilities for its restructuring plans are as follows (in millions):



	Aon Hewitt Plan			Aon Benfield Plan			2007 Plan			Other			Total
Balance at December 31, 2012	$	96		$	3		$	35		$	3		$	137
Expensed	76			—			—			—			76
Cash payments	(58		)	(1		)	(18		)	(1		)	(78		)
Foreign exchange translation and other	—			—			4			—			4
Balance at June 30, 2013	$	114		$	2		$	21		$	2		$	139

Aon Hewitt Plan [Member]

Restructuring and Related Cost

Schedule of restructuring and related expenses by type

The following table summarizes restructuring and related costs by type that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):



	2010		2011		2012		Second Quarter 2013		Six Months 2013		Total to Date		Estimated Total Cost for Restructuring Plan (1)
Workforce reduction	$	49	$	64	$	74	$	14	$	38	$	225	$	261
Lease consolidation	3		32		18		34		36		89		128
Asset impairments	—		7		4		3		3		14		15
Other costs associated with restructuring (2)	—		2		2		2		2		6		7
Total restructuring expenses	$	52	$	105	$	98	$	53	$	79	$	334	$	411

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(1)

Actual costs, when incurred, will vary due to changes in the assumptions built into this plan. Significant assumptions that may change when plans are finalized and implemented include, but are not limited to, changes in severance calculations, changes in the assumptions underlying sublease loss calculations due to changing market conditions, and changes in the overall analysis that might cause the Company to add or cancel component initiatives.


(2)	Other costs associated with restructuring initiatives, including moving costs and consulting and legal fees, are recognized when incurred.

Aon Hewitt Plan [Member] | Total operating segments [Member]

Restructuring and Related Cost

Schedule of restructuring and related expenses by type

The following table summarizes the restructuring and related expenses, by segment, that have been incurred and are estimated to be incurred through the end of the restructuring initiative related to the Aon Hewitt Plan (in millions):



	2010		2011		2012		Second Quarter 2013		Six Months 2013		Total to Date		Estimated Total Cost for Restructuring Plan (1)
HR Solutions	$	52	$	49	$	66	$	36	51		$	218	$	249
Risk Solutions	—		56		32		17		28		116		162
Total restructuring expenses (1)	$	52	$	105	$	98	$	53	$	79	$	334	$	411

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(1) Costs included in the Risk Solutions segment are associated with the transfer of the health and benefits consulting business from HR Solutions to Risk Solutions effective January 1, 2012. Costs incurred in 2011 in the HR Solutions segment of $41 million related to the health and benefits consulting business have been reclassified and presented in the Risk Solutions segment.